Driving and stopping mechanism



R. '0. PI ERCE.

DRIVINGAND STOPPING MECHANISM.

'APPLICATION FILED SEPT-12,1921.

Patented June 27, 1922.

4 8HE'ETSSHEET 2.

Inzwnivr R. C. PIERCE DRIVING AND STOPPING MECHANISM.

APPLICATION FILED SEPT. 12, I921.

Patented June 27, 1922 4 SHEETS SHEET 3.

B. (I; PIERCE. DRIVING AND STOPPING MECHANISM. APPLICATION FILED SEPT-12,1921.

1,420,744. Pater ltedJune 27, 1922.

4 SHEETS-SHEET 4.

[7'2 van/Km" jZnZwrZ 6. Pia we.

ROBERT C. PIERCE, OF AKRON, OHIO, ASSIGNOR TO THE B. F. GOODRICH COMPANY, I

OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DRIVING AND STOPPING MECHANISM.

Specification of Letters Patent. Patented June 27, 1922.

Application filed September 12, 1921. Serial No. 499,961.

Toallwho'miit may concern: I Be it known that 1, ROBERT C. PIERCE, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Driving and Stopping Mechanism, of which the following is a specification.

This invention relates to driving and stopping mechanisms for winding machines, especially such as are adapted for ring winders, and is mainly an. improvement upon machines of the character shown in United States Patent 1,294,160, issued February 11, 1919, to A. C. Pratt, for making grommets or bead rings for pneumatic tires, wherein a wire drawn from a spool carried by a ring winder is fed into an annular, channeled form or guide-member, by a wire feeding device also carried by the ring winder, the wire being pushed circumferentially around in the form until several convolutions of wire, constituting a grommet,

lie within the form. Such a grommet, as taken from the machine, is shown in Fig. 6

(Sheet 2) of the drawings herein and preferably consists of a single, continuous wire comprising a semi-circular core strand A, six convolutions B of the same wire, wound helically about said core strand and about the corresponding empty core space throughout therest of the circle, and a length of straight Wire C adapted to be forced in between the convolutions to fill the core space and complete the core.

In prior machines of this character, there has been used a cam drum for timing the operation of the ring winder,-which lays the wire in helical convolutions, andof the wire feeding mechanism, carried by the ring winder, which feeds the wire into theform,

and a cone brake has been used to stop the ring winder, but in such devices the stopping point of the ring winder is not accurately predetermined, and it therefore usually requires to be turned by hand to bring its slot into position for removal of the work,

and more or less than the desired amount of helical wire frequently is fed intothe form.

Moreover, the cam drum has been driven;

step by step, by a pawl and ratchet mechanism, and the machine has been adapted for different sized bead rings by changing the stroke of the pawl to vary the speed of the cam drum, each size of bead ring thus requiring a different speed of the drum, which is difficult accurately to obtain, by the means stated, and only such speedscan be obtained as correspond to the number of ratchet teeth whlchjmay be embraced in the stroke of the pawl,--that is, the drum in such a device is capable only of the speed corresponding to provide such means adaptedfor minute ad-.

justment for operations of differentlength. Further objects are to provide an improved timing mechanism wherein the length of operation may be predetermined by linear measurement, instead of varying the speed of a part, and automatic means for resetting.

the machine after each complete operation.

Of the accompanying drawings: Fig. 1 is a rear elevation, with parts broken away, of a preferred embodiment of winding grommets.

- Fig. 2 is a fragmentary side elevation parts of the stopping mechanism.

Fig. 3 is a diagram of the electric system. Fig. 4 is an end elevation of the machine, with parts broken away. I Fig. 5 .is a fragmentary sectional view of the cam drum showing an adjustable weight for automatically positioning said drum.

Fig. 6 is an elevation of a grommet as produced by a machine such as that shown in the drawings.

Fig. 7 is a front elevation of the machine, with parts broken away, showing the cam drum in stopped position at the completion of an operation; 1

Fig. 8 is a view, with apart broken away,

of certain parts in inoperative position, from the same viewpoint as Fig. 7. v

' Fig. 9 is a front elevation, with parts my invention as applied to a machine for' broken away, showing the cam. wheel, the

brake mechanism, and parts associated therewith, in starting position.

Fig. 10 is .a front elevation of parts of the device, including those shown in Fig. 2, the same being shown in actual position with relation to Fig. 9.

Fig. 11 is a section on line 11-11 of Fig. 9.

Fig. 12 is a perspective view of a part of the cam drum and a device co-acting there with.

Referring to the drawings, 10 is a frame upon which is mounted in a horizontal plane a form 11 in the shape of an incomplete annulus, provided with a channel 12 (Flg. 7) adapted to be opened for removing the finished work. Encircling the space between the open ends of said form is aperipherallysupported ring-winder 13 having a driv ng gear-13. Said ring-winder carries a wiresupply spool 14 journaled in a head 14? and two pairs of wire-feeding rollers 15, 15, whose shafts 15 are driven through gearing 15", a shaft 15, and gearing 15 from a bevel gear 15 which meshes with a bevel gear 16 on the rear end of a sleeve 16 journaled within the ring-winder, said sleeve having at its front end a spur gear 16 Y which is rotated in the same direction as passing the grommet out of the machine;

thewinder, but at a higher speed, by means presently to be described. The ring-winder 13, its gear 13*, the sleeve 16 and its two gears 16 and 16 are all radially slotted for The rollers 15 are adapted to feed wire from the spool 14 into one of the open ends of the guide-channel 12. 17 is a spiraling die or quill, mounted upon the ring-winder and formed with a helical channel therethrough, adapted to guide the wire from the feed-rollers 15 into the channel 12, and, when the ring-winder is driven, to impart a permanent helical form to the wire as it passes through said die. It heretofore has been known that while such helical form is given to the wire when it is fed through the die with the ring-winder in motion, the straight wire for the core of the bead ring may be obtained by feeding'the Wire through the die while the, ring-winder is stopped, the

wire which has passed through the die being prevented from rotating on its own axis, the wirein this case 'notbeing permanently deformed, although passing through the die.

It is thus desirable, for rapid production,

that at the end of the feeding of the spiraled convolutions' the ring-winder be stopped while the Wire-feeding rollers continue to be driven, to feed enough straight wire for the last half core ofone bead ring and the first half-core of the next bead ring, while the straight wire is prevented from turning upon its own axis by its integral connection with the body of the grommet.

The form '11 is then opened, the straight wire cut at an appropriate point and the grommet in the shape shown in Fig. 6 is removed. The form is then closed with the first half-core of the second ring lying therein, the ring-winder is started, and the spiraled convolutions are laid. The last half-core C of the grommet is worked into place between the spiral turns by hand.

For a perfect grommet, extreme accuracy is desirable in the lengths fed respectively of the spiraled andnon-spir'aled wire. 'It.

is therefore important that the stopping of winder, but means for delicately adjusting the application of the brake, and said meansshould be adaptable for bead rings of dif,

ferent sizes. It is also desirable that the ring-winder be stopped with the radial slot thereof within the gap in the ring-winder support, andthat the sleeve 16 be stopped thereafter,- at the end of the feeding of straight wire, with its slot in registry with that of the ring-winder, to facilitate the removal of the work.

Means for driving the ring-winder 13 and the wire-feeding rollers 15 comprises a drive shaft 18 provided with a sprocket 19 and drive chain 20 (Fig. 1),. said drive shaft having secured thereon gears 21,.22 (Figs. 4 and 7)v respectively meshed with gears 23, 24 loosely journaled on respective shafts 25, 26, the gear 23 being provided with a jaw clutch member 27 (Figs; 4: and ',11). 26 is a handwheel secured upon the front end of the shaft 26, for turning the sleeve 16* to bring its slot into registry with that of the ring-winder 13 in case of imperfect operation of the parts hereinafter described, or in other emergency, to'permit the removal of the work. Secured upon the rear ends of "said. shafts 25, 26, are gears 28, 29, respectively meshed with the gears 13 and '16", heretofore mentioned (Fig. 7). Slidably keyed upon shaft 25 is a jaw clutch member 30 (Figs. 4 and 11), provided with a springprojected shipper slide 31, the s ring being shown at 31 in Fig. 11, said. 0 utch being adapted for driving and releasing'the ringwinder.

Secured upon the shaft 25 adjacent the gear 28 is a brake-drum provided with a brake-band 34, the movable end of which is connected with the lower arm of a compoundlever 35 secured to a rock-shaft 36 journaled in the frame of the machine, said lever having an upper arm in the form of a lever member 37 pivoted at 37 to oscillate in the plane of the rock-shaft 36. This member is provided with a roller 38 at its outer end adapted, when said member is operatively positioned, to engage a springbacked brake-shoe 39. pivoted upon the spool-support 141 of the winder. as the latter revolves past said roller. Said brake-shoe preferably is curved, as shown, and so posiby a telescopic link 43 containing a com-- 'pression spring 44, with the lever 37, for

throwing the roller 38 into the pathjofthe brake-shoe 39 and withdrawing it therefrom. A tension spring 45. connects the lower arm of the lever 42 with a part of the frame of-the machine to hold the roller 38 normally out of saidpath. f p v The mechanism for actuating the aforementioned clutch and brakescompris es a cam drum 46 provided with a. gear- 46 on its periphery with which meshes a gear pinion 47 secured upona common shaft 48 with a hand-crank 49 and a. worm gear 50, the

latter being driven by a-worm 51 upon a shaft 52 journaled in a sleeve 53 pivoted upon the drive shaft 18. 54,55 are bevel gears secured upon the drive shaft '18 and the worm shaft 52, respectively, for driving the latter. An extension 53 on the sleeve 53 rests on a'cam'56 which is pulled by a spring 56 into the Worm meshing positionshown in Fig. 1 and is adapted to be turned in the opposite direction by a treadle-rod 57 and treadle 5'2 to allow the worm to drop out of mesh as indicated in Fig. 8, a manually-releasable -latch 53 servingto retain said sleeve in the latter position.

' (Figs. 4, 7 and 9), adapted to crowd the lower end of the lever 42 to. the left, as'

The cam drum 46 is provided with a cam 1 member 58 formed with an inclined face 58 viewed in Fig. 7, to turnthe shaft 36 and tighten the brake-band 34,.and'with a laterally-acting, oblique face-58 adapted subsequently'to crowd the lever 42 to the right, as viewed imFig. 4, to throw the roller 38 into the path .of the brake-shoe 39, this cam being adjustable eircumferentially on the drum to time its action.

Said cam drum 46 is also provided with an elongated, laterally-acting cam 59, shown as being adjustable circumferentially onthe .druni tol time its action,valthough I prefer to leave it in a fixed position'a'nd adapt the machine for different sized'rings-b'y ad-.

justing other members hereinafter describedif Said cam 59 is adapted to actuate the shipper slide 31 to'throw'out the driving clutch.

member 30 of the ring-winder. Also upon' the cam drum 46 is a circumferentially adjustable power stopping camlug 46 adapted to open an electricswitch 46 to shut off the power when the desired ingth ofstraight wire has been fed into the form 11, and immediately thereafter to close a normally open switch 46' by contact with a lever 46 to actuate a hereinafter described stopping mechanism for the wire-feeding means. The cam drum is large enough to control, duringle'ss than a complete revolution, the several operations incident to one complete wire-feeding movement of both straight and helical wire, even forthe large size beads, so that said drum at the end of each complete operation, while free from the general driving mechanism, requires to he turned forward from its stopped to its starting position for the next wire-feeding movement. The starting position for the cam drum 46 is determined by a circurnferentially adjust 'able stop 61 (Figs. 1, and 7) secured to the cam drum 46 and adapted to be engaged by a lever 60 provided with a stop lug 60 and a spring-pressed latching pawl 60"' when the drum reaches the starting position.

Said lever 60 is pivoted at 60 and is so positioned that the rear end of itis pressed= i downward 'by the treadle 57, against theaction of a'spring 60, wheneversaid treadle is depressed, raising-the opposite end of said the stop 61.

- The cam drum 46 is provided with a rad ilever into position for its lug 605 to engage ally and angularly. adjustable weight 46 (Figs. 5 and 7) so-fixed upon the cam-drumthat when the entire machine is'stopped, by the cam lug 46 actuating the switches 46, Mia-said weight 'will'be on the descending side of the drum' 46 in such position that it will automatically turnthe drum forward to starting position, bringingthe stop 61 against the lug 60 of the lever 60, where itis retained by the pawl 60?, when the cam drum is released from its driving'worm 51 by depressing the treadle 57.

T 0 determine the effective length of the cam 59, which must hold out the ring-winder clutch whilethe straight wire is being fed,

'I provide the shipper-slide 31- with a springpressed shoe '63", pivoted in a slot, or recess formed in said slide, said shoe being thus.

adapted yieldingly to ride upon the cam drum 46 while. secured against lateral movementrelative to its slide. and to be engaged by the side face of the cam 59 to actuate said. I

slide. Alongside the cam 59 is secured a short circuniferentially adjustable vswitch- I ing-cam' 65 (Figs. 9, 11 and 12) adapted to liftthe shoe63 and permit the slide 31 to be shifted by its spring 31 to throw in the clutch-member 30, the shoe 63 thereafter riding upon the cam 59,-as shown in Fig. 9, I

to the end of said cam.v

To assure that the sleeve 16" (Fig.

'when stopped, at the end .of each complete operation, will have its radial slot in registry with that of the ring winder 13, topermit removal of the work, I provide upon the shaft 26 a pair of disks 66, 67 (Figs. 2 and the former being secured to said shaft and the latter loosely journaled. Said disks are each provided with a stud, 68, 69, upon their adjacent faces, anc' oring the respectivev ends of a coiled spring 70 encircling the shaft 26. The disk 67 is formed with a notch 71 in its periphery adapted to receive a pawl 72 (Fig. 10), connected by a link 72 with a lever 77 pivoted upon a bracket 77, said lever beingadapted to be actuated by an electro-inagnet 73 against the action of a spring 7 3 to positively stop said disk when the normally open switch 46 is closed by the cam lug 46 on the 5am drum 46 (Fig. 7), while the disk 66 and shaft 26 continue to turn until stopped by the stress of the spring 70,

the reaction of the spring 70 then turning the disk 66 and shaft 26 backward until the stud 68 comes back into contact with the stud 69, thus stopping the sleeve 16 with its slot in alignment with that of the ring-winder 13. With a spring of suitable strength the disk 66 turns through only a small are after the pawl 72 stops the disk 67 and the short return movement and consequent backward feeding of thewire-feeding rollers 15 (Fig.

1) does not excessively slack the wire anterior to said feed rollers.

An emergencystopping switch 74 and. a starting switch 75 are convenientlv posi tioned on the frame of the machine (Fig. 7), and 76 is'a guard member secured to the lever 77-, the latter being actuated by the electro-magnet 73, said guard member thus being held over the starting switch 75 when the disk 67 is engaged by the pawl 72, to prevent the starting of the machine until said pawl hasbeen withdrawn by the spring 7 3 upon the de-energizing of the electro-magnet 73 as hereinafter described.

The electric wiring system, diagrammatically shown in Fig. 3, comprises three incoming lines 78, 78, 7 8 of an alternating three phase circuit, adapted to be connected with corresponding motor lines 79, 79?, 7 9

' to the motor 84, by a self opening contactor '1 magnet 813' switch 80 adapted to be closed by an electroa, 2 are "titresconnecting a single phase transformer 82 with the incoming lines 78, The secondary y, y, of said transformer is branched; one branch thereof, :12, a2, :0, connecting in series the electro-magnet 73 (Figs. 3, 7 and 10), and the normally open switch 46 (Figs. 3 and.- 7). The other branch w,

- v, u, g, connects in series the electro-magnet I 81', the normally closed stopping switch 46 (Figs. 3'and 7), and the normallyopen starting switch 75 (Figs. 3 and 7), while a branch therefrom, 2., s, 1', takes in the nor mally closed emergency stopping switch 74 (Figs. 3 and .7) and a switch 83 (Fig. 3)

opening and closing with the motor switch 80, thus connecting them in series with the electro-magnet 81 and the stopping switch 46 and cutting out the starting switch 75.

It will be seen that this system is so arranged that the momentary closing ofthe switch 46 energizes. the electro-magnet73 and thereby raises the pawl 72 into contact with the disk 67 to be engaged in the notch 71 thereof. y I Y In the operation of the machine, the cam drum 46, being in starting position, with the driving clutch 27, 30 (Fig. 4) engaged andthe stop 61 held between the lug of the lever 60 and the pawl60 (Fig. 1), the treadle 57 is released, allowing the spring .80 motor switch 80, falls open. Closingof the 56* (Figs. 1 and 7) to raise the worm 51 into mesh with the gear 50 and thelever 60 to disengage the stop 61. The starting switch 75 Figs. 3 and 7) is then momentarily closed, whereupon the electro-mag net 81 (Fig. '3) closes the motor switch 80 and the switch 83 and continues 'to hold them closed afterthe starting switch 7 5 is allowed to .reopen, the current passing from the wire it through the wires 6, s, 1' instead of through the switch 75'and the wire g. Themotor 84 thendrives the ring-winder 13 and the sleeve 16 counter-clockwise as'viewedin Fig. 7,

the latter at the higher speed. H

By reason of the difference :oftheirespective speeds of the rin -winder 13.,and

, the sleeve'16, the wire-feed ng jrollers 1'5fcarriedby the ring-winderare driven, feeding? .wire through the die 17, andinto the form '11, said wire being given a permanent helical form by its passage through sa'iddie while the ring-winder is turning. When a'pr'edetermined amount, usually six convolutions, of helical wire has thus been fed into the form, the cam 59 actuates the shipper slide 31, releasing the drive of the ring-winder 13, while the wire-feeding rollers 15 continue to be driven and, the wire beyond the die being prevented from turning on its axis, feed into the form 11 a length of straight wire predetermined by the setting of the stopping camlug 46 (Fig. 7 which upon'reaching the stopping switch 46 opens the latter, de-ener izing the electro magnet 81 (Fig. 3), and a lowing the motor switch 80 and the switch 83 to fall open.

At approximately the time the'clutch 27, v

30 of the ring-winder is released, the inclined face 58 of the cam 58 forces the lower movement with its slot in registry with that of said ring-winder.

' 5. In a machine of the the combination of a slotted ring-winder, a mounting therefor having a radial opening, a driving shaft for said ring-winder, a clutch positioned operatively between said shaft and said ring-winder, a set of wire-feeding feed-rollers mounted on said ring-winder,

- olution, so asto'sto said ring-winder in a" predetermined angu a'r position.

7. In a windin machine the combination a driving member for said feed-rollers jour-' nailed concentrically with said ring-winder and adapted to be driven ',by said shaft,

means for stopping said ring-Winder with. its slot in registry with the opening of its mounting, means for stopping said' roller driving member Withits slot in registry with that of said ring-winder, and means vfor disengaging .said clutch, actuating said ring" winder-stopping means and, at a stated interval thereafter, actuating said drivingmember -stop ping means. y I y 6. In a winding machine the combination of a slotted ring winder and a stop mecha-- nism therefor, said I stop mechanism comprising a friction brake member mounted upon afixed part-of the machine and a frietion brake member carried by va rotary part of the machine and-adapted to coact with the firstpsaid friction brake member in a brakingaction during a part only of its revof a rotary spodhcarrying member and a; "stopinechanism therefor, said stop mechanism comprising braking means, mounted upon a fixed part of the machine, and brak-' ingmeans carried by a rotary part off the machine and adapted to, coact with thefirst said braking means in a braking actiondur- 'ing a part only ,of the revolution of said rotary vmember, said respective braking -means being adapted, to coact to produce a sition. I

bra-king action of progressively increasing force and thereby'to stop said spool-carry-- ing member in a predetermined angular po;

8; In a winding machine, the combination i of a rotary member adapted to wind stranded material onto the work, a friction brake therefor adapted to brake said rotary memher without. regard to theangular position character described,

resume of the latter, to lessen its speed, braking means adapted to act upon said rotary'm'emher only when the latter is in a predetermined part of its revolution, and a timing and controlling mechanism adapted to-bring said friction brake into operation first, to

lessen the speed of said rotary member, and then to bring said braking-means into operation, to stop said rotary member in a predetermined angular position. I

9. In a winding machine, the combination of a rotary member adapted to windstranded material onto the work, eccentricallymounted braking means thereon, and braking means mounted upon a stationary part of said machine and adapted to be'brought' into' coo eration with said eccentricallymounted b rakingmeans at a predetermined part of the lattersrevolution, to brake and stop said, rotary member, 1

10. In a winding machine, the combina- -tion of a rotary member adapted to wind stranded material onto the work, a frictionbrake member carried thereby,and a fric- 1 tion-brake member mountedupon a stationary part of said machine and adapted. to be moved into the path of thefirst-said frictionbrake member, said friction-brake members [being so formed andpositioned as to produce upon said rotary member a braking action of progressively increasing force, and

ultimately a positive stop.

.11. In a winding machine, the combination of a rotary member'adapted to Wind stranded material 'onto the work, africtionbrake therefor, an eccentrically-mounted contact-member carried by a rotary'part of said machine, a secon contact-member adapted to be moved into the path of said I eccentrically-mounted contact-member, and actuatmgmeans for said friction-brake so connected with the second contact-member as to be'actuated thereby when said eccentrically-mounted contact-member contacts said second contact-member.

' 12. In a winding machine, the combination of a rotary winder adapted to wind stranded material onto the work, a friction braketherefor, a brake lever for said friction brake, and a contact member eccentrically mounted on said winder and adapted to engage said brake lever to actuate said frictlon brakeat a predetermined part of the revolution of said winder.

l3. a gromet-Winding machine, the combination of a ring-winder, wire-feeding means on said ring-winder, a cam drum for controlling the action of said ring-Winder and said wire-feeding means,"a worm-gear adaptedto drive said drum, a worm associated with said gear, and means for throwing said worm into andout of mesh with said gear to drive and release'said drum.

14. In apparatus of the character described, the combination of a ring-winder,

a brake therefor, braking means adapted to act only when said winder is in a predetermined part of its revolution, and means connecting the two brakin means for increasing the force of the crater when the latter is,in action.

15. In a machine of the character described, the combination of a ring-winder, wire-feeding means carried thereby and adapted to function while said winder is either in motion or stopped, a cam drum for timing the stopping of said winder and said W1T-fe8dlilg means, means for driving said cam drum, means for freeing of its revolution, a drum adapted to actuate said-brake mechanisms, means-for driving said drum, and means for freeing said drum from said driving means. I

17 In apparatus of the character de scribed the combination of a ring-winder, a cam drum adapted to control the operation thereof, means for driving said drum, means for freeing said drum vfrom said drivin means, and means adapted automatica ly to turn said drum to a predetermined position when the latter is so freed. 18. In apparatus of the character described the combination of a ring-winder, a cam drum adapted to control the operation thereof, means for driving said drum, means. for freeing said drum from said driving means, means for turning said drum to a predetermined position when it is so freed, a driving clutch for said winder, a member adapted to be crowded by a cam on said drum to shift said clutch, and means upon said cam drum for subsequently moving said member in adifi'erent direction from that in which it is so. crowded, to free it from the action of said cam.

19. Ina -machine of the character de scribed the combination of a ring-winder, a driving clutch therefor, a c, a springprojected member adapted to be crowded by one face of said cam to shift said clutch, y elding means for virgin said member 1n a direction parallel wit said face, and

means forlifting said member past said face against the action of said yielding means to permit said member to ride upon an adjacent face of said cam, 1

20. In apparatus of the character de scribed, the ,combination of a ring-winder, a cam drum for controlling the operation thereof, means'for drivin said drum, means for freeing said drum rem said driving means, and a weight mounted eccentricaily upon said cam drum and adapted vaiitomaticall to turn said drum to; a predetermine position, when the latter is so freed,

21. In apparatus of the character described, the combination of a ring-winder, a cam drum for controlling the operation thereof, means for drivin said dru-m, means for freeing said drum rom said driving means, separate means for turning said drum when so freed, and ,means for posi-' tively stopping said drum in a predetermined position, the last said means being adapted to be moved respectively into when the drum is freed from its first men tioned driving'means and re-engaged therewith.

22. In a winding machine ,of the character described, the combination of a ring-winder, a cam drum for controlling the operation thereof, an eccentricallypositioned weight on said drum, and means for stopping said drum in a predetermined position when turned thereto by said weight.

23. In a windin machine of the characteronner 2c. rinses.

have hereunto set w so and out of operative position automatically 

